Circulating-box for pulp-screens.



pPa-tented Mar. 4, I902. L. WHALLEY. CIRCULATING BOX FOR PULP SCREENS.(Application filed Aug. 7, 1901. (No Model.)

2 Sheets-Sheet 2.

IN I I Wih csscs THE NORRIS PEYERS co. mormuwoq WASHINGYON. u. c.

UNITED STATES PATENT QEEIQE.

LUKE W ALLEY, OF wATERT owN, NEW YORK.

ClRC U LATlNG-BOX FOR PU LP-SCREENS.

SPECIFICATION forming part of Letters Patent No. 694,707, dated March 4,1902.

Application filed August '7, 1901. Serial No. 71,262. (NomodeL) v To allwhom it may concern:

Be it known that I, LUKE WHALLEY, a citizen of the United States ofAmerica, residing at Watertown, in the county of Jefferson and State ofNew York, have invented a new and useful Improvement inCirculating-Boxes for the stuff, as it is termed, in such condition thatslugs form and spoil thepaper. The present invention is intended toprevent this waste of material andaflordsan effectual washup for thescreens and practically does away with the slugs, resulting in a largesaving in time and material. My improved circulating-box also lessensthe water in the top of the screen, causes a transfer of the water backthrough the box, and mixes the material up beneath the screen, thusstopping all slugs, which is the cause of breaks on the machine andmakes bad paper.

With the foregoing objects in view my invention consists in certainnovel features of construction and combinations of parts,which will behereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure l is a plan View of a screen,showing my improved circulating-box in position alongside and incommunication therewith. Fig. 2 is an end elevation, and Fig. 3 is aView in perspective, of my improved circulating-box.

A represents the framework of the machine,

and B is the usual screen.

0 indicates my improved circulating-box. Of course its dimensions may bevaried without limit; but the preferred dimensions from actual practicaldemonstration are about seven feet ten inches in length by, say, ten andthree-fourths inches in height and seven and one-fourth inches inwidth'or thereabout. As shown in Figs. 1 and 2, this box extends alongone side of the screen, where it is secured in any approved manner andwith which it communicates freely through conmeeting-pipes 1 1 l. A pipeD extends lengthwise through the box, as illustrated, from one end tothe other. Fresh water is admitted through the right-hand end of thispipe under a pressure of, say, forty pounds to the square inch throughvalve 2. This water discharges into the box, through holes 3, 3, boredat intervals in the portion of the pipe in the box, at say intervals ofsix inches apart. In this Way the water is discharged evenly in the box.The valve 4 on the left is for the return of water. Inthis way the flowis kept up and a constant circulation is maintained, thus effectuallyregulating the stuff and preventing slugs. The pipe also serves to washthe screen when the machine is down and being cleaned, in that Waysaving the time of two men raising the screen and washing out with thehose.

It is evident that slight changes might be resorted to in the form andarrangement of the several parts described without departing from thespirit and scope of my invention,

. and hence I do not Wish to limit myself to exact construction hereinset forth; but,

c Having fully described my invention, what I claim as new, and desireto soon re by Letters Patent, is

- 1. The combination with a screen for papermaking machines, of acirculating-box in communication therewith, a perforated pipe leadingthrough said box, and valves in said pipe. 2. A circulating box forpaper making screens, having a pipe extending therethrough,said pipeperforated for the discharge and distribution of its water throughoutthe interior of the box, and valves in each end of thepipe.

In testimony whereof I have signed this specification in the presence oftwo subscrib in g witnesses.

' LUKE WHALLEY.

lVitnesses:

JOHN WHITE, BLANOHE OUTTERSON.

